* bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers
@ 2021-09-08 13:21 Stephen Berman
2021-09-08 13:26 ` Lars Ingebrigtsen
0 siblings, 1 reply; 4+ messages in thread
From: Stephen Berman @ 2021-09-08 13:21 UTC (permalink / raw)
To: 50474
Enabling whitespace-mode in Gnus Group, Summary or Article buffers
removes the Gnus-specific fontification in these buffers. This happens
when whitespace-color-on calls font-lock-add-keywords, which tests (and
font-lock-mode (not (or font-lock-keywords font-lock-defaults))), and in
the Gnus buffers font-lock-mode is t and font-lock-keywords and
font-lock-defaults are both nil, so the test succeeds and consequently
the following sexps are evaluated:
(font-lock-mode -1)
(setq-local font-lock-defaults '(nil t))
(font-lock-mode 1)
which removes the buffer fontification. Adding `(font-lock-mode -1)' to
the gnus-{group,summary,article}-mode definitions prevents this (i.e.,
keeps the Gnus-specific fontification), but then the whitespace-mode
faces are not applied to the Gnus buffers.
In GNU Emacs 28.0.50 (build 16, x86_64-pc-linux-gnu, GTK+ Version 3.24.29, cairo version 1.17.4)
of 2021-09-08 built on strobelfs
Repository revision: 439ca062c830a7f3288a2dac48457edf5b1bfc59
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Linux From Scratch 10.2-rc1
Configured using:
'configure --with-native-compilation 'CFLAGS=-Og -g3'
PKG_CONFIG_PATH=/opt/qt5/lib/pkgconfig'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG
RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM
GTK3 ZLIB
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers
2021-09-08 13:21 bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers Stephen Berman
@ 2021-09-08 13:26 ` Lars Ingebrigtsen
2021-09-08 13:48 ` Stephen Berman
0 siblings, 1 reply; 4+ messages in thread
From: Lars Ingebrigtsen @ 2021-09-08 13:26 UTC (permalink / raw)
To: Stephen Berman; +Cc: 50474
Stephen Berman <stephen.berman@gmx.net> writes:
> Enabling whitespace-mode in Gnus Group, Summary or Article buffers
> removes the Gnus-specific fontification in these buffers.
Yes, that's not supported -- none of the font locking stuff can be used
in Gnus buffers (since it controls the fonts itself).
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers
2021-09-08 13:26 ` Lars Ingebrigtsen
@ 2021-09-08 13:48 ` Stephen Berman
2021-09-09 13:43 ` Lars Ingebrigtsen
0 siblings, 1 reply; 4+ messages in thread
From: Stephen Berman @ 2021-09-08 13:48 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: 50474
On Wed, 08 Sep 2021 15:26:55 +0200 Lars Ingebrigtsen <larsi@gnus.org> wrote:
> Stephen Berman <stephen.berman@gmx.net> writes:
>
>> Enabling whitespace-mode in Gnus Group, Summary or Article buffers
>> removes the Gnus-specific fontification in these buffers.
>
> Yes, that's not supported -- none of the font locking stuff can be used
> in Gnus buffers (since it controls the fonts itself).
That's what I assumed, but is it documented? (I briefly looked but
didn't see anything relevant.) And although it's probably not too
common to enable whitespace-mode in a non-editable Gnus buffer, it is a
gotcha if you happen to do so. It would be user-friendly to prevent
that, but maybe the effort isn't worth it.
Steve Berman
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers
2021-09-08 13:48 ` Stephen Berman
@ 2021-09-09 13:43 ` Lars Ingebrigtsen
0 siblings, 0 replies; 4+ messages in thread
From: Lars Ingebrigtsen @ 2021-09-09 13:43 UTC (permalink / raw)
To: Stephen Berman; +Cc: 50474
Stephen Berman <stephen.berman@gmx.net> writes:
> That's what I assumed, but is it documented?
Apparently not, so I've now added a paragraph to the Gnus manual about this.
> (I briefly looked but
> didn't see anything relevant.) And although it's probably not too
> common to enable whitespace-mode in a non-editable Gnus buffer, it is a
> gotcha if you happen to do so. It would be user-friendly to prevent
> that, but maybe the effort isn't worth it.
Yeah, I don't think it's worth it -- your report about this is the first
time I can recall somebody trying this in... er... has it been 30
years now? :-)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-09-08 13:21 bug#50474: 28.0.50; whitespace-mode in non-editable Gnus buffers Stephen Berman
2021-09-08 13:26 ` Lars Ingebrigtsen
2021-09-08 13:48 ` Stephen Berman
2021-09-09 13:43 ` Lars Ingebrigtsen
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